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Case Closure Summary Page 2. <br /> :king Underground Fuel Storage Tank Prom <br /> ill Release and Site Characterization Information (continued) <br />[ <br /> FMaxim7um7DOc7um7ented7C7ontaminant Concentrations --Before-and After Cleanup <br /> I minant Soil (ppm) Water (ppm} Contaminant - Soil <br /> Before After Before After M7.9 <br /> (ppm) <br /> as Before After <br /> } 15000 560 120 <0.05 Xylene 1900 <Q.00DSiesel) NA NA NA NA Ethylbenzene 970 e 3.1 0.45 29 DA005T 0.0005, Oil&Grease NA oluene 910 2.0 1,8 <0.0005 Heavy Metals <0.5 PbNA <br /> NA <br /> MTBE NA 0.0013 <br /> Comments: The soil before concentrations are from soil boring ASB-1 (except Heavy Metals-Pb from the 1990 tank removal <br /> soil results); soil after concentrations are from confirmation soil boring CB-1. Both ASB-1 and CB-1 are within 10 feet of the <br /> former UST in the source area. The ground water before concentrations and the ground water after concentrations are from <br /> VE-3 screen 25-45 feet bs 20 feet down- dradient of the former UST. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan?Yes <br /> Does completed corrective action protect potential beneficial uses per the Regional Board Basin Plan? Yes <br /> Does corrective action protect public health for current land use? Yes <br /> Site management requirements: NA for current use <br /> Should corrective action be reviewed if land use changes? Yes <br /> Monitoring/Vapor wells Installed: 14 Number Decommissioned: 0 Number retained: 14 <br /> List enforcement actions taken: Level.one, NOR sent to the RP <br /> List enforcement actions rescinded: NA I <br /> V. LocaL89ency Representative Data <br /> Name: Adrienne Ellsaesser Title: Acting Program Coordinator <br /> Signature: Date: <br /> A?J1ICj <br /> Vi. Central Valle Re Tonal Water Qualit Control Board RB Notification <br /> Date Submitted'to RB: Response Date: <br /> RB Staff: Jim Barton Response: <br /> Title: Engineering Geologist <br /> VII. Additional Comments, Data, etc. i <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official <br /> site file. <br /> i' <br />